The Heckler and Koch selector lever (HK part no. 50227870) is a factory replacement part for the HK416/MR556A1 fire control group, the lever a shooter rotates to move between safe and fire positions. Like other small HK416 internals, it’s manufactured to HK’s own tolerances rather than generic AR-15 mil-spec, so armorers and owners replacing a worn or damaged selector lever need the genuine factory part rather than a standard AR-15 substitute. It’s a straightforward, direct-fit replacement for anyone servicing an HK416/MR556A1-pattern rifle’s fire control group.

Key Specifications

• Genuine Heckler and Koch factory selector lever.
• Built specifically for the HK416/MR556A1 fire control group.
• Manufactured to HK-specific tolerances, not generic AR-15 mil-spec.
• Direct-fit replacement for a worn or damaged factory lever.
• Moves the rifle between safe and fire positions.

Frequently Asked Questions

Will a standard AR-15 selector work instead? HK416/MR556A1 rifles use HK-specific tolerances in the fire control group, so the genuine factory lever is the safer choice.

Is this a drop-in replacement? Yes, it’s a direct-fit replacement for the factory selector lever.

What rifle is this built for? The HK416/MR556A1 platform.

Buy the HK Auto Selector Lever

Keep your HK416/MR556A1’s fire control group running as designed. Order the Heckler & Koch / H&K selector lever from our rifle parts lineup, and our Lubbock, Texas team can help confirm compatibility before it ships.